//No.87 Advent Calendar Problem

import java.util.*;
import java.io.*;
import static java.util.Arrays.*;
import static java.lang.Math.*;

public class No87 {
    
    static final Scanner in = new Scanner(System.in);
    static final PrintWriter out = new PrintWriter(System.out,false);

    static void solve() {
        long n = in.nextLong()-2014;
        Calendar c = Calendar.getInstance();
        c.set(2014,7,23);
        int w = c.get(Calendar.DAY_OF_WEEK);
        int cnt = 0;
        while (n - 400 >= 0) {
            n -= 400;
            c.add(Calendar.DAY_OF_YEAR,400);
            cnt += 57;
        }
        for (int i=0; i<=n; i++) {
            c.add(Calendar.DAY_OF_YEAR,1);
            if (w == c.get(Calendar.DAY_OF_WEEK)) cnt++;
        }
        out.println(cnt);
    }

    public static void main(String[] args) {
        long start = System.currentTimeMillis();

        solve();
        out.flush();

        long end = System.currentTimeMillis();
        //trace(end-start + "ms");
        in.close();
        out.close();
    }

    static void trace(Object... o) { System.out.println(deepToString(o));}
}